K's denki Stadium Mito, Multi-purpose stadium in Mito, Japan.

K's denki Stadium Mito is a 400-metre, nine-lane blue polyurethane running track around a 106 by 69 metre natural grass field, with tiered seating for about 12,000 in main, back and side stands. A cantilevered roof carried on slender grey columns arcs over the main stand, and a 6.5 by 11.5 metre Astrovision screen stands at the far side.

Opened in 1987 with about 5,000 seats in the main stand only, the stadium lacked floodlights, a scoreboard and even a PA booth, so Mito HollyHock played home games in Naka and Hitachinaka. A full renovation ran from July 2007 to October 2009, adding seats to the back stand, a larger main-stand roof, a video screen and night lighting. The stadium became HollyHock's official home in 2010.

The stadium has been Mito HollyHock's home ground since 2010, and the club's name comes from the hollyhock, Mito's city flower. The ground is known as "Ks Stadium" after K's Holdings, a Mito-based electronics chain that bought the naming rights in August 2009. The main stand holds 7,000 of the roughly 12,000 seats.

The stadium lies 9.2 km from Mito Station; a bus to "Shiritsu Kyogijo" runs once a day on weekends, and the "Shokubutsu Koen" bus on weekdays stops 1.4 km away. On Mito HollyHock match days, buses from Mito and Akatsuka stations go directly to the ground. The four on-site car parks hold about 1,200 vehicles and are free, but exits are single, so leaving after matches can take over two hours.

The 2011 damage was repaired, not rebuilt: the main stand roof bent, the lighting towers and big screen were damaged and the grass-seat area subsided. The main stand stayed closed until October 2011, reopening for the 16 October match against Tokyo Verdy. The pitch drainage pipes, buried deep under the grass, could not be fixed, so the field was resurfaced after the 2014 season.